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        <h4 id="Basic"><a href="#Basic" class="headerlink" title="Basic"></a><code>Basic</code></h4><ul>
<li><p><strong>异或运算及其应用-查找奇数个数的数字</strong></p>
<figure class="highlight plaintext"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br></pre></td><td class="code"><pre><span class="line">异或运算的运算法则：</span><br><span class="line">1. a ^ b = b ^ a</span><br><span class="line">2. a ^ b ^ c = a ^ (b ^ c) = (a ^ b) ^ c</span><br><span class="line">3. d = a ^ b ^ c  可得： a = d ^ b ^ c</span><br><span class="line">4. a ^ b ^ a = b</span><br><span class="line"></span><br><span class="line">应用：连续异或运算，找出字符串中个数为奇数的那个字符（法则2、4）。如str = &quot;abcdfabc&quot; ,则：</span><br><span class="line">for i in str: ans^=str[i]  ::ans is &#x27;f&#x27;</span><br></pre></td></tr></table></figure></li>
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<h4 id="Python"><a href="#Python" class="headerlink" title="Python"></a><code>Python</code></h4><h4 id="Golang"><a href="#Golang" class="headerlink" title="Golang"></a><code>Golang</code></h4>
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